Color #CD181B Color / Colour Code #CD181B
This page shows the hex color code for color #cd181b (#CD181B). The colour is a red tone with 79% saturation and 45% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #CD181B against common backgrounds.
Complementary Colors
#CD181B paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 329, 359, and 29 degrees for harmonious combinations.
Triadic Palette
Three colors at 359, 119, and 239 degrees.
Color Palettes Using #CD181B
Five shades at lightness levels 15% through 85% while keeping hue at 359 and saturation at 79%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 359 to 44 degrees create a warm, unified palette. This analogous scheme works for marketing materials, seasonal campaigns, and any design that needs visual warmth without clashing colors.
Combines the base color at hue 359 with its complement at 179 and two adjacent cool tones. This split-complementary approach provides strong visual contrast while remaining more balanced than a pure complementary scheme.
Five evenly spaced hues at 40% saturation and 80% lightness. Pastels are gentle on the eyes and work well for dashboards, onboarding screens, category tags, and any interface where multiple distinct colors are needed without visual aggression.
Shades & Tints of #CD181B
Lightness variations at hue 359 and 79% saturation.
CSS Gradients with #CD181B
Design Use Cases for #CD181B
Vibrant Brand Color
#CD181B has a strong 79% saturation that makes it ideal for brand identity elements. Use it for logos, primary call-to-action buttons, hero section accents, and marketing materials where visual impact matters. This saturation level is eye-catching without being harsh.
Primary Interface Color
At 45% lightness, #CD181B is in the mid-range, making it ideal for interactive elements like buttons, links, and selected states. This lightness level ensures good contrast against both light and dark adjacent elements in most layouts.
Urgency & Energy Signaling
#CD181B falls in the red spectrum (hue 359). Red triggers urgency and excitement, making it effective for sale badges, countdown timers, error messages, and "limited time" labels. In data visualization, use it to flag negative values or critical thresholds.
Gradient Pairing
Create a gradient from #CD181B (hue 359) to its complement at hue 179. For a subtler effect, try pairing with an analogous color at hue 29. Use CSS: background: linear-gradient(135deg, #cd181b, #18cdca);
CSS Code for #CD181B
Similar Colors
Colors visually similar to #CD181B based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #CD181B across image editing and color design tools.
About Color #CD181B (#CD181B)
#CD181B is a red color (colour) with RGB channel values of 205 red, 24 green, and 27 blue. The red channel is dominant by a ratio of 8.5:1 over the weakest channel. In HSL terms, the hue sits at 359 degrees with 79% saturation and 45% lightness, placing it in the warm range of the colour spectrum.
The perceived brightness of #CD181B is 78/255 using the ITU-R BT.601 luma formula (0.299R + 0.587G + 0.114B). This appears dark to the human eye, so pair it with light text for adequate readability. For print production, the CMYK equivalent is 0% cyan, 88% magenta, 87% yellow, and 20% key (black).
The WCAG contrast ratio of #CD181B against white is 5.61:1 and against black is 3.74:1. This meets the AA requirement (4.5:1) for normal text on white. For AAA compliance, consider darkening to at least 31% lightness.
The complementary colour #18CDCA creates maximum visual tension when paired with #CD181B. For more harmonious color combinations, use the analogous colours #CD1876 and #CD7018, which sit 30 degrees on either side of the hue wheel. To build a complete design system, start with the monochromatic scale above for consistent shade variations, then add one complementary or triadic accent for interactive elements.
How to Explore Color #CD181B
- Enter your color value in HEX format.
- The tool converts it to RGB, HSL, CMYK format in real time.
- Copy the converted value to your clipboard.
What is HEX to RGB, HSL, CMYK color conversion
Converting from HEX to RGB, HSL, CMYK translates a color value between two different color models. Different color models are used in web design (HEX, RGB), print (CMYK), and color theory (HSL, HSV).
Related Tools & Colors
Frequently Asked Questions
- What color / colour is #CD181B?
- #CD181B is Color #CD181B, a red color (colour) with RGB(205, 24, 27), HSL(359, 79%, 45%), and CMYK(0%, 88%, 87%, 20%). Its perceived brightness is 78/255.
- Is #CD181B accessible for text?
- Against white, #CD181B has a contrast ratio of 5.61:1 (passes AA for normal text). Against black, it has 3.74:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #CD181B?
- The complementary colour is #18CDCA (hue 179). For subtle color combinations, use analogous colours #CD1876 and #CD7018. The triadic palette adds #1BCD18 and #181BCD for vibrant variety.
- How do I use #CD181B in CSS?
- Use any format: color: #cd181b; or rgb(205, 24, 27); or hsl(359, 79%, 45%). For CSS custom properties: --color-primary: 359 79% 45%; then use it as hsl(var(--color-primary)).
- Is this color / colour explorer free?
- Yes, completely free with no signup required. All colour calculations run in your browser. You can explore any valid hex color code, not just the pre-generated palette.